JPH10147912A - Method for removing and erecting bridge - Google Patents
Method for removing and erecting bridgeInfo
- Publication number
- JPH10147912A JPH10147912A JP31028196A JP31028196A JPH10147912A JP H10147912 A JPH10147912 A JP H10147912A JP 31028196 A JP31028196 A JP 31028196A JP 31028196 A JP31028196 A JP 31028196A JP H10147912 A JPH10147912 A JP H10147912A
- Authority
- JP
- Japan
- Prior art keywords
- girder
- bridge
- span girder
- barge
- span
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、河川等の橋梁の撤
去および架設方法に関する。The present invention relates to a method for removing and erection of bridges such as rivers.
【０００２】[0002]
【従来の技術】河川等の水路に架設されている橋梁は、
道路事情または老朽化のため、撤去して新規橋梁に架設
替えする需要が増大している。2. Description of the Related Art Bridges installed in waterways such as rivers are:
Due to road conditions or aging, the demand for removing and replacing with new bridges is increasing.
【０００３】既設橋梁の撤去方法の従来技術として、
「道路構造物の解体技術に関する調査研究報告書」
（（財）道路保全技術センター道路構造物保全協会解体
部会）によれば、図１０、図１１に示す方法が知られて
いる。As a conventional technique for removing an existing bridge,
"Survey and Research Report on Road Structure Demolition Technology"
According to the Road Conservation Technology Center Road Structure Conservation Association Dismantling Subcommittee, the methods shown in FIGS. 10 and 11 are known.
【０００４】図１０は、従来技術における橋梁の撤去方
法を示した側面図で、橋桁２０上の床版コンクリート２
１を除去し橋軸方向で分割した主桁２２を、橋体上のク
ローラクレーン２３で吊り上げ、トラック２４に積込み
解体場所へ撤去する方法（以下、従来技術１という。）
である。尚、Ｐ1 、Ｐ2 、Ｐ3 、Ｐ4 は橋脚であり、６
は水路面、Ａ2 は橋台である。FIG. 10 is a side view showing a method of removing a bridge according to the prior art.
1 is removed and the main girder 22 divided in the bridge axis direction is lifted by a crawler crane 23 on the bridge body, loaded on a truck 24 and removed to a dismantling place (hereinafter referred to as prior art 1).
It is. P 1 , P 2 , P 3 , P 4 are piers and 6
Water road, A 2 is a bridge abutment.
【０００５】また、図１１は、他の従来技術における橋
梁の撤去方法を示した側面図で、ゲルバー桁３０上の床
版コンクリートを除去し橋軸方向で分割した主桁３１
を、橋台Ａ1 ，Ａ2 側はトラッククレーン３２で撤去
し、水路面６側の主桁３１は、桁受け３３が設けられた
台船３４を主桁３１の下部に位置させ、満潮を利用して
主桁３１を持ち上げ、撤去する方法（以下、従来技術２
という。）である。FIG. 11 is a side view showing a bridge removing method according to another prior art, in which a slab concrete on a gel bar girder 30 is removed and a main girder 31 divided in the bridge axis direction.
The abutments A 1 and A 2 are removed by a truck crane 32, and the main girder 31 on the waterway surface 6 side is provided with a barge 34 provided with a girder support 33 below the main girder 31 and uses high tide. To remove the main girder 31 and remove it (hereinafter referred to as the prior art 2
That. ).
【０００６】また、橋梁の架設方法として、前述の図１
０および図１１の撤去工程とは逆の工程で橋桁を架設す
る方法、あるいは、ケーブルクレーン片持式工法等が知
られている。[0006] As a method of erection of the bridge, FIG.
A method of erection of a bridge girder in a process opposite to the removal process of FIG. 0 and FIG. 11 or a cantilever type construction method of a cable crane is known.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、橋桁の
撤去方法における前記従来技術１は、クローラクレーン
を用いる方法であるから、吊られる主桁は３５トン程度
が限度となり、橋脚スパンが短い比較的小型の橋梁であ
るか、または、軽量化のため床版コンクリートを除去し
た橋桁を橋軸方向に分割した主桁とする必要があり、作
業効率が悪いという問題点がある。However, since the prior art 1 in the method of removing the bridge girder uses a crawler crane, the main girder to be suspended is limited to about 35 tons, and the bridge pier span is relatively small. Or the bridge girder from which the floor slab concrete has been removed needs to be a main girder divided in the bridge axis direction for the purpose of weight reduction, and there is a problem that work efficiency is poor.
【０００８】また、前記従来技術２は、台船を用いるも
のの満潮時を利用して主桁を持ち上げ、撤去する方法で
あるので、撤去作業に長時間を要するという問題点があ
り、また、長時間の作業は、他の通航船の航行を阻害す
るという問題点がある。Further, the prior art 2 uses a barge to lift and remove the main girder at high tide, so that it takes a long time to remove the main girder. There is a problem that time work hinders the navigation of other passing vessels.
【０００９】また、前記従来技術以外の想定技術とし
て、橋梁の撤去に大型のフローティングクレーンを使用
すれば一挙に解決できるが、通常、河川等の水路には複
数の橋が架設されており、前記大型のフローティングク
レーンは、他の既設橋梁の下部の通航が不可能であり、
使用できない制約がある。[0009] As a supposed technology other than the conventional technology, a large floating crane can be used to remove a bridge, which can be solved all at once. However, usually, a plurality of bridges are installed in waterways such as rivers. Large floating cranes cannot pass under other existing bridges,
Some restrictions cannot be used.
【００１０】さらに、橋桁の架設方法としての前述の従
来技術においては、撤去と同様に小ブロックでの架設と
なり、あるいは、干満を利用する方法であり架設効率が
悪い問題点がある。また、橋桁の架設方法として大型フ
ローティングクレーンにより一括搭載方式があるが、既
設の他の橋梁が架設されている河川等では、該大型フロ
ーティングクレーンの通航が不可能であったり、設備コ
ストが高くつく問題がある。Further, in the above-mentioned prior art as a method of erection of a bridge girder, the erection is carried out in small blocks as in the case of removal, or the method of utilizing the ebb and flow is inferior in erection efficiency. As a method of erection of bridge girders, there is a batch mounting method using a large floating crane. However, in a river or the like on which another existing bridge is erected, passage of the large floating crane is impossible, and equipment costs are high. There's a problem.
【００１１】本発明は、河川等の水路に架設された橋桁
の撤去および架設作業を、安全かつ迅速に行うことを目
的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to safely and promptly remove and install a bridge girder installed on a waterway such as a river.
【００１２】[0012]
【課題を解決するための手段】前述の課題を解決する第
一の手段は、側径間桁の両端を、中央径間桁および隣接
する側径間桁上の吊り下げ機構で両端支持しながら切断
し、該切断された側径間桁の下方に台船を配置し、前記
切断された側径間桁を前記吊り下げ機構で降下させなが
ら台船で支持して前記切断された側径間桁を橋体から離
脱させた後に、中央径間桁の下方に吊り上げ機構付の台
船を配置し、該台船の吊り上げ機構により前記中央径間
桁を持ち上げて橋体から離脱させることを特徴とする橋
梁の撤去方法により解決される。A first means for solving the above-mentioned problem is to support both ends of a side span girder by suspending the both ends by a suspension mechanism on a center span girder and an adjacent side span girder. Cutting, disposing a barge below the cut side span girder, lowering the cut side span girder by the hanging mechanism, supporting the barge on the barge, and cutting the side span girder. After the girder is detached from the bridge body, a barge with a lifting mechanism is arranged below the central span girder, and the central span girder is lifted by the lifting mechanism of the barge and separated from the bridge body. Is solved by the method of removing bridges.
【００１３】前述の第一の手段によれば、橋桁の撤去
は、側径間桁または中央径間桁単位に撤去されるので、
短時間に作業を終えることができ、また、側径間桁は支
承沓および橋脚が干渉しない切断位置で切断し、下降さ
せることにより撤去し、残された中央径間桁は、支承沓
で支持させ、台船の吊り上げ機構により支承沓より上方
へ持ち上げで撤去される。According to the first means described above, since the removal of the bridge girder is performed in units of the side span girder or the center span girder,
The work can be completed in a short time, and the side span girder is cut at the cutting position where the support shoe and the pier do not interfere, removed by lowering it, and the remaining center span girder is supported by the support shoe. Then, the lifting mechanism of the barge lifts and removes it from the bearing shoe.
【００１４】側径間桁は、中央径間桁および隣接する側
径間桁上に設けた吊り下げ機構で支持されながら切断さ
れ、下方へ移動して撤去される。The side span girder is cut while being supported by a suspension mechanism provided on the center span girder and the adjacent side span girder, and is moved downward to be removed.
【００１５】前述の課題を解決する第二の手段は、切断
された側径間桁は、台船のジャッキで支持されることを
特徴とする前記第一の手段に記載の橋梁の撤去方法によ
り解決される。[0015] A second means for solving the above-mentioned problem is that the cut side span girder is supported by a jack of a barge, and the bridge removing method according to the first means is characterized in that: Will be resolved.
【００１６】前述の第二の手段によれば、台船にジャッ
キを設け、該ジャッキに側径間桁を支持させて解体地へ
運び、陸揚げに際し、該ジャッキを昇降手段として使用
することにより、干満差等の台船のドラフト調整が行
え、撤去した側径間桁の陸揚げが迅速に行える。According to the second means described above, the jack is provided on the barge, and the jack supports the side span girder and is transported to the demolition site, and when landing, the jack is used as an elevating means. Draft adjustment of the barge such as ebb and flow can be performed, and the removed side span girder can be landed quickly.
【００１７】前述の課題を解決する第三の手段は、台船
上で運搬されてきた中央径間桁を該台船の吊り上げ機構
により持ち上げて橋脚に支持させた後、架設位置に台船
で運搬されてきた側径間桁を中央径間桁および隣接する
側径間桁上の吊り上げ機構で両端支持しながら吊り上
げ、該側径間桁を前記中央径間桁および隣接する側径間
桁に接合することを特徴とする橋梁の架設方法により解
決される。A third means for solving the above-mentioned problem is that the center span girder carried on the barge is lifted by the lifting mechanism of the barge and supported by the pier, and then transported to the erection position by the barge. The side span girder has been lifted while being supported at both ends by a lifting mechanism on the center span girder and the adjacent side span girder, and the side span girder is joined to the center span girder and the adjacent side span girder. The problem is solved by a method of erection of a bridge characterized by the following.
【００１８】前述の第三の手段によれば、中央径間桁
は、吊り上げ機構付の台船で一挙に支承沓で支持、架設
できるので作業が迅速であり、また、側径間桁は中央径
間桁および隣接する側径間桁上に固定された吊り上げ機
構で両端支持しながら吊り上げ架設されるので、吊り上
げ精度が確保され、中央径間桁および隣接する側径間桁
との接合が容易である。According to the third means described above, the center span girder can be supported and erected at once by a support boat with a barge with a lifting mechanism, so that the work is quick. It is lifted and erected while supporting both ends by a lifting mechanism fixed on the span girder and the adjacent side girder, so that the lifting accuracy is ensured and it is easy to join with the center girder and the adjacent side girder. It is.
【００１９】前述の課題を解決する第四の手段は、架設
される側径間桁が台船上に設けたジャッキ上で運ばれ、
架設位置に配置されることを特徴とする前記第三の手段
に記載の橋梁の架設方法により解決される。A fourth means for solving the above-mentioned problem is that a span girder to be erected is carried on a jack provided on a barge,
According to a third aspect of the present invention, there is provided a bridge erection method, wherein the bridge erection method is arranged at an erection position.
【００２０】前述の第四の手段によれば、側径間桁がジ
ャッキ上に載置されているので、架設の据付け調整が容
易であり、また、製作ヤードからの積出しが、干満差等
のドラフト調整に対し、該ジャッキにより容易に行え
る。According to the above-mentioned fourth means, since the side span girder is mounted on the jack, installation and adjustment of the erection can be easily performed, and shipping from the production yard can be performed by measuring the difference between the height and the height. Draft adjustment can be easily performed by the jack.
【００２１】[0021]
【発明の実施の形態】以下、本発明にかかる橋梁の撤去
方法について、図面を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for removing a bridge according to the present invention will be described below with reference to the drawings.
【００２２】図１は、連続箱桁橋で例示した本発明にか
かる橋梁の撤去方法の工程を示す橋梁の側面図である。FIG. 1 is a side view of a bridge showing steps of a method for removing a bridge according to the present invention exemplified by a continuous box girder bridge.
【００２３】図１において、１、２、３、４、５は連続
箱桁からなる橋梁の橋桁で、その中で１、２、４、５は
側径間桁、３は中央径間桁である。In FIG. 1, reference numerals 1, 2, 3, 4, and 5 denote bridge girders consisting of continuous box girders. is there.
【００２４】前記橋桁１、２、３、４、５は、橋脚
Ｐ1 、Ｐ2 、Ｐ3 、Ｐ4 上に架けられており、６は河川
等の水路を示す。尚、橋桁１、５の陸側端部は図示しな
い橋台で支持されている。The bridge girders 1 , 2 , 3 , 4 , and 5 are bridged on piers P 1 , P 2 , P 3 , and P 4 , and 6 indicates a water channel such as a river. The land side ends of the bridge girders 1 and 5 are supported by an abutment (not shown).
【００２５】７は、底部を橋桁１、３、５上に固定した
吊り下げ機構で、該吊り下げ機構７は、ジャッキ７ａと
架構７ｂとから構成され、ジャッキ７ａは橋桁下部に係
止されたストランド等の吊り索７ｃを２ケのクランプ
（図示せず）で交互に把持しシリンダー機構（図示せ
ず）で該把持状態のクランプを上下動されることにより
橋桁の上昇、下降を行わせるもので、ＶＳＬジャッキ
（商標）として公知のものである。該吊り下げ機構７
は、同様の機能のものであれば、特に、前記ＶＳＬジャ
ッキに限定されない。Reference numeral 7 denotes a suspension mechanism having a bottom fixed on the bridge girders 1, 3, and 5. The suspending mechanism 7 includes a jack 7a and a frame 7b, and the jack 7a is locked at a lower part of the bridge girder. Lifting and lowering of a bridge girder by alternately gripping a hanging cable 7c such as a strand with two clamps (not shown) and vertically moving the clamp in the gripped state by a cylinder mechanism (not shown). And is known as VSL Jack ™. The suspension mechanism 7
Is not particularly limited to the VSL jack as long as it has the same function.
【００２６】本発明においては、まず、側径間桁４の撤
去から開始する。前記吊り下げ機構７、７で側径間桁４
の両端を吊持した状態で切断線８を切断する。切断位置
は、連続桁の場合、側径間桁４のモーメントの反曲点ま
たはその近傍が望ましい。In the present invention, first, the removal of the side span girder 4 is started. The side span girder 4 is provided by the suspension mechanisms 7 and 7.
The cutting line 8 is cut in a state where both ends are suspended. In the case of a continuous girder, the cutting position is desirably at or near the inflection point of the moment of the side span girder 4.
【００２７】切断と並行して、側径間桁４の下方に台船
９（９Ａ，９Ｂ）を配置しておく。尚、９′は前記台船
９Ａ，９Ｂの連結体である。In parallel with the cutting, the barges 9 (9A, 9B) are arranged below the side span girders 4. Reference numeral 9 'denotes a connected body of the barges 9A and 9B.
【００２８】図２は、本発明の次工程を示した側面図
で、切断が完了したら吊り下げ機構７で側径間桁４を徐
々に降下させ、下方の前記台船９Ａ，９Ｂの甲板に荷重
を支持させて、前記吊り下げ機構７の吊り索７ｃの係止
を解除する。FIG. 2 is a side view showing the next step of the present invention. When the cutting is completed, the side span girder 4 is gradually lowered by the suspension mechanism 7 and the lower decks of the barges 9A and 9B are lowered. The load is supported, and the locking of the suspension cable 7c of the suspension mechanism 7 is released.
【００２９】前記台船９Ａ，９Ｂに載置された側径間桁
４は、橋梁の幅方向に移動して橋体からの撤去が行わ
れ、解体場所へと回航される。The side span girder 4 mounted on the barges 9A, 9B moves in the width direction of the bridge, is removed from the bridge body, and is circulated to the dismantling site.
【００３０】図３は、本発明の次工程を示した側面図
で、前述と同様、吊り下げ機構７、７で側径間桁２の両
端を吊持しながら切断を行い、台船９Ａ，９Ｂに載置さ
せて、側径間桁２の橋体からの撤去を行う。尚、側径間
桁２、４の撤去の順番は、逆でもよい。FIG. 3 is a side view showing the next step of the present invention. Similar to the above, cutting is performed while suspending both ends of the side span girder 2 with the suspending mechanisms 7, 7. Place it on 9B and remove the side span girder 2 from the bridge. The order of removing the side span girders 2 and 4 may be reversed.
【００３１】また、台船９に、通常の油圧シリンダー型
のジャッキを甲板上に設け、前記側径間桁２、４の荷重
を該ジャッキで支持させてもよい。Further, a conventional hydraulic cylinder type jack may be provided on the deck of the barge 9 to support the load of the side span girders 2 and 4 with the jack.
【００３２】台船９上にジャッキを設置しておけば、撤
去された側径間桁２、４を解体地で陸揚げする場合に昇
降手段として使用することができる。If a jack is installed on the barge 9, it can be used as a lifting means when the removed side span girders 2, 4 are landed at the dismantling site.
【００３３】図４は、本発明の次工程を示した側面図
で、残された中央径間桁３の撤去が行われる。中央径間
桁３の撤去は、橋脚Ｐ2 およびＰ3 の支承沓１０、１０
に支持されているので、該支承沓１０より高く中央径間
桁３を持ち上げて、橋桁の幅方向に移動する必要があ
る。FIG. 4 is a side view showing the next step of the present invention. The remaining center span girder 3 is removed. Removal of the central span girder 3, bearing piers P 2 and P 3 shoe 10,10
Therefore, it is necessary to lift the center span girder 3 higher than the bearing shoe 10 and move it in the width direction of the bridge girder.
【００３４】よって、以下に示す吊り上げ機構付台船１
１により、中央径間桁３を支承沓１０より高く持ち上げ
て撤去する。Therefore, the barge 1 with a lifting mechanism shown below
By 1, the center span girder 3 is lifted higher than the bearing shoe 10 and removed.
【００３５】１１は台船で、吊り上げ機構１２を有する
対の台船１１Ａ，１１Ｂから構成されている。吊り上げ
機構１２は、前述のＶＳＬジャッキに代表される吊り下
げ機構７と実質同一で、吊り上げのストロークを行う機
構である。尚、１１′は前記台船１１Ａおよび１１Ｂを
結合する連結体である。Reference numeral 11 denotes a barge, which comprises a pair of barges 11A and 11B having a lifting mechanism 12. The lifting mechanism 12 is substantially the same as the hanging mechanism 7 represented by the above-described VSL jack, and is a mechanism for performing a lifting stroke. Reference numeral 11 'denotes a connecting body for connecting the barges 11A and 11B.
【００３６】図５は、図４の左側の台船１１Ａの平面図
であり、図６は図５のＡ矢視図である。FIG. 5 is a plan view of the barge 11A on the left side of FIG. 4, and FIG. 6 is a view taken along the arrow A of FIG.
【００３７】図５において、１１Ａは台船、１１ａはウ
ィンチ、１１ｂは係留索であり、台船１１Ａの移動は、
一方のウィンチ１１ａで係留索１１ｂを手繰り寄せ、他
方のウィンチ１１ａで他方の係留索１１ｂを繰り出すこ
とにより行う。In FIG. 5, 11A is a barge, 11a is a winch, 11b is a mooring line, and the movement of the barge 11A is as follows.
This is performed by dragging the mooring line 11b with one winch 11a and pulling out the other mooring line 11b with the other winch 11a.
【００３８】３は中央径間桁、３ａは該中央径間桁３の
主桁、３ｂは該中央径間桁３の床板である。該床板３ｂ
にはハッチングで示す貫通長孔３ｄが穿たれ、吊り上げ
機構１２の上部架構１２ｂの支柱１２ｄおよび該支柱１
２ｄのブレース材（図示せず）が貫通する。同じよう
に、中央径間桁３が下降したとき、台船１１Ａの下部架
構１３の支柱１４も前記中央径間桁３の床板３ｂの貫通
長孔３ｄを貫通する。さらに、３ｅは同じように中央径
間桁３の主桁３ａに穿たれた貫通孔で、吊り上げ機構１
２のジャッキ１２ａの吊り索１２ｃが貫通する。吊り索
１２ｃは主桁３ａの底面に係止される。Reference numeral 3 denotes a center span girder, 3a denotes a main girder of the center span girder 3, and 3b denotes a floor plate of the center span girder 3. The floorboard 3b
Is provided with a through-hole 3d indicated by hatching, and a support 12d of an upper frame 12b of the lifting mechanism 12 and the support 1d.
A 2d brace material (not shown) penetrates. Similarly, when the center span girder 3 descends, the strut 14 of the lower frame 13 of the barge 11A also penetrates the through hole 3d of the floor plate 3b of the center span girder 3. 3e is a through hole formed in the main girder 3a of the center span girder 3 in the same manner.
The suspension cable 12c of the second jack 12a penetrates. The suspension cable 12c is locked on the bottom surface of the main girder 3a.
【００３９】図６においては、台船１１上の下部架構１
３の支柱１４に吊り上げ機構１２の上部架構１２ｂの支
柱１２ｄがフランジ結合されている。また、中央径間桁
３は、運搬時は、破線図の如く下降する状態を示してい
る。尚、図６に図示したブレース材１２ｅおよび水平材
１２ｆは取外し可能となっている。In FIG. 6, the lower frame 1 on the barge 11
The supporting column 12d of the upper frame 12b of the lifting mechanism 12 is flange-connected to the third supporting column 14. In addition, the center span girder 3 shows a state in which the center span girder 3 descends as shown by a broken line diagram. The brace member 12e and the horizontal member 12f shown in FIG. 6 are removable.
【００４０】中央径間桁３は、以上の構造の台船１１Ａ
により撤去されるが、撤去に際し、まず、中央径間桁３
の下方に下部架構１３付の台船１１を配置するととも
に、該中央径間桁３の上方から、ジャッキ１２ａ付の上
部架構１２ｂを配置し、上部架構１２ｂの支柱１２ｄと
下部架構１３の支柱１４を連結し、吊り索１２ｃを主桁
３ａに係止する。次に、ジャッキ１２ａの作動により、
中央径間桁３を持ち上げ、橋軸に対して幅方向に移動、
降下させて台船１１で解体場所へ回航され、解体され
る。尚、陸側の側径間桁１、５は、鋼製連続桁の場合は
前記側径間桁２、４と同様の方法により撤去されるが、
コンクリート製で構築されている場合は、小ブロックに
砕き撤去される。The center span girder 3 is a barge 11A having the above structure.
The center span girder 3
The barge 11 with the lower frame 13 is arranged below the center frame, and the upper frame 12b with the jack 12a is arranged from above the center span girder 3 to support the column 12d of the upper frame 12b and the column 14 of the lower frame 13. And the suspension cable 12c is locked to the main girder 3a. Next, by the operation of the jack 12a,
Lift the center span girder 3 and move in the width direction with respect to the bridge axis,
It descends and is circulated to the dismantling place by the barge 11 and is dismantled. In addition, the side span girder 1, 5 on the land side is removed in the same manner as the side span girder 2, 4 in the case of a steel continuous girder,
If it is made of concrete, it is broken into small blocks and removed.
【００４１】次に、本発明にかかる橋梁の架設方法につ
いて、図７、図８および図９により説明する。橋梁の架
設については、前述の撤去の工程と逆の工程を行う。Next, a method for erection of a bridge according to the present invention will be described with reference to FIGS. For the construction of the bridge, the reverse of the above-mentioned removal process is performed.
【００４２】図７（側面図）は、本発明の架設工程を示
し、まず、中央径間桁３が台船１１上で運搬されてき
て、該台船１１の吊り上げ機構１２により前記中央径間
桁３を持ち上げて橋脚Ｐ2 、Ｐ3 上の支承沓１０、１０
に支持させて、架設する。FIG. 7 (side view) shows the erection process of the present invention. First, the center span girder 3 is transported on the barge 11, and the center span girder 3 is lifted by the lifting mechanism 12 of the barge 11. piers P 2 lift the digit 3, P 3 on the bearing shoes 10, 10
Erection.
【００４３】図８（側面図）は、本発明の架設工程を示
し、中央径間桁３が架設されたら、側径間桁２の架設位
置に台船９で運搬されてきた側径間桁２を中央径間桁３
および隣接する側径間桁１端部上の吊り上げ機構７で両
端支持しながら吊り上げ、前記側径間桁２の両端を前記
中央径間桁３および隣接する側径間桁１の端部に接合す
る。FIG. 8 (side view) shows the erection process of the present invention. When the center span girder 3 is installed, the side span girder carried by the barge 9 to the installation position of the side span girder 2 is shown. 2 is the center span girder 3
And, both ends of the side span girder 2 are joined to the center span girder 3 and the end of the adjacent side span girder 1 while being lifted while both ends are supported by the lifting mechanism 7 on the end of the adjacent side span girder 1. I do.
【００４４】図９（側面図）は、本発明の架設工程を示
し、側径間桁４も該側径間桁４の架設位置に台船９で運
搬されてきた側径間桁４を中央径間桁３および隣接する
側径間桁５端部上の吊り上げ機構７で両端支持しながら
吊り上げ、該側径間桁４を前記中央径間桁３および隣接
する側径間桁５の端部に接合する。FIG. 9 (side view) shows the erection step of the present invention. The side span girder 4 is also centered on the side span girder 4 transported by the barge 9 to the installation position of the side span girder 4. The span girder 3 and the adjacent side span girder 5 are lifted while being supported at both ends by a lifting mechanism 7 on the end thereof, and the side span girder 4 is lifted up at the end of the center span girder 3 and the adjacent side span girder 5. To join.
【００４５】側径間桁２または４の前記中央径間桁３お
よび隣接する側径間桁１もしくは５との接合は、例え
ば、中央径間桁３とのモーメント連結接合を先に行い、
その後、他端部を隣接する側径間桁１もしくは５の橋脚
Ｐ1 またはＰ4 の支承沓に設置、固定する。前記モーメ
ント連結について説明すると、中央径間桁３は中央部が
弛んだ弓なり状となり、端部は上向きの傾斜状となって
いるので、該端部の形状に一致させて側径間桁２または
４も傾斜状態で接合すれば、中央径間桁３はほぼ直線状
に形成される。前記の接合手段は、高張力ボルト等が用
いられる。For joining the side span girder 2 or 4 with the center span girder 3 and the adjacent side span girder 1 or 5, for example, the moment connection joint with the center span girder 3 is performed first.
Then, placed in bearing shoes piers P 1 or P 4 in side span girder 1 or 5 adjacent the other end, and fixed. The moment connection will be described. The center span girder 3 has a bow-like shape with a slack central portion and an end portion having an upwardly inclined shape. If the center 4 is also joined in an inclined state, the center span girder 3 is formed substantially linearly. As the joining means, a high tension bolt or the like is used.
【００４６】また、前記側径間桁２、４は、台船９にジ
ャッキを設け、該ジャッキで支持しながら架設されても
よい。台船９にジャッキを設ければ、側径間桁２、４の
積出しにおける、干満差等の台船９のドラフト調整の昇
降手段として使用でき、積出しが容易である。また、架
設の据付け調整が容易となる。The side span girders 2 and 4 may be provided with jacks on the barge 9 and installed while being supported by the jacks. If a jack is provided on the barge 9, it can be used as a lifting / lowering means for draft adjustment of the barge 9 such as a difference in ebb and flow when loading the side span girders 2 and 4, and loading is easy. In addition, installation adjustment of the erection becomes easy.
【００４７】尚、側径間桁１、５の架設は、水深が充分
確保される場合は、前記側径間桁２、４と同様の方法に
より架設してもよい。The side span girders 1 and 5 may be installed by the same method as the side span girders 2 and 4 when the water depth is sufficiently secured.
【００４８】[0048]
【発明の効果】本発明は、以上のとおりであるから、橋
桁を巨大な桁単位で撤去および架設できるので、作業効
率が向上し、他船の通航を長時間にわたり通航止めとす
ることがない。As described above, according to the present invention, the bridge girder can be removed and erected in units of giant girders, so that the work efficiency is improved and the passage of other ships is not stopped for a long time. .
【００４９】また、中央径間桁は吊り上げ機構付の台船
で一挙に撤去および架設するので設備コストが安価であ
る。Further, since the center span girder is removed and erected at once by a barge with a lifting mechanism, the equipment cost is low.
【図１】本発明の撤去工程を示す側面図。FIG. 1 is a side view showing a removing step of the present invention.
【図２】本発明の撤去工程を示す側面図。FIG. 2 is a side view showing a removing step according to the present invention.
【図３】本発明の撤去工程を示す側面図。FIG. 3 is a side view showing a removing step of the present invention.
【図４】本発明の撤去工程を示す側面図。FIG. 4 is a side view showing a removing step of the present invention.
【図５】本発明の撤去、架設に使用する吊り上げ機構付
台船の平面図。FIG. 5 is a plan view of a barge with a lifting mechanism used for removal and erection of the present invention.
【図６】図５のＡ矢視図。FIG. 6 is a view taken in the direction of arrow A in FIG. 5;
【図７】本発明の架設工程を示す側面図。FIG. 7 is a side view showing the erection process of the present invention.
【図８】本発明の架設工程を示す側面図。FIG. 8 is a side view showing the erection step of the present invention.
【図９】本発明の架設工程を示す側面図。FIG. 9 is a side view showing the erection process of the present invention.
【図１０】従来技術における橋梁の撤去、架設方法。FIG. 10 shows a conventional bridge removal and erection method.
【図１１】従来技術における他の橋梁の撤去、架設方
法。FIG. 11 shows a method for removing and erection of another bridge in the prior art.
１ 側径間桁 ２ 側径間桁 ３ 中央径間桁 ４ 側径間桁 ５ 側径間桁 ６ 水路 ７ 吊り下げ・上げ機構 ８ 切断部 ９ ジャッキ付台船（９Ａ，９Ｂ） １０ 支承沓 １１ 吊り上げ機構付台船（１１Ａ，１１Ｂ） １２ 吊り上げ機構 １２ｂ 上部架構 １３ 下部架構 DESCRIPTION OF SYMBOLS 1 Side span girder 2 Side span girder 3 Center span girder 4 Side span girder 5 Side span girder 6 Waterway 7 Suspension / lifting mechanism 8 Cutting part 9 Jacked barge (9A, 9B) 10 Bearing shoe 11 Barge with lifting mechanism (11A, 11B) 12 Lifting mechanism 12b Upper frame 13 Lower frame
Claims (4)
接する側径間桁上の吊り下げ機構で両端支持しながら切
断し、該切断された側径間桁の下方に台船を配置し、前
記切断された側径間桁を前記吊り下げ機構で降下させな
がら台船で支持して前記切断された側径間桁を橋体から
離脱させた後に、中央径間桁の下方に吊り上げ機構付の
台船を配置し、該台船の吊り上げ機構により前記中央径
間桁を持ち上げて橋体から離脱させることを特徴とする
橋梁の撤去方法。1. A method for cutting both ends of a side span girder while supporting both ends by a suspension mechanism on a center span girder and an adjacent side span girder, and a barge below the cut side span girder. After the cut side span girder is detached from the bridge body by supporting the barge while lowering the cut side span girder by the suspension mechanism, the lower side of the center span girder A method for removing a bridge, comprising: disposing a barge with a lifting mechanism on the bridge, and lifting the center span girder from the bridge body by the lifting mechanism of the barge.
で支持されることを特徴とする請求項１に記載の橋梁の
撤去方法。2. The method for removing a bridge according to claim 1, wherein the cut side span girder is supported by a jack of a barge.
船の吊り上げ機構により持ち上げて橋脚に支持させた
後、架設位置に台船で運搬されてきた側径間桁を中央径
間桁および隣接する側径間桁上の吊り上げ機構で両端支
持しながら吊り上げ、該側径間桁を前記中央径間桁およ
び隣接する側径間桁に接合することを特徴とする橋梁の
架設方法。3. The center span girder carried by the barge is lifted by the lifting mechanism of the barge and supported by the pier, and then the side span girder carried by the barge to the erection position is centered on the center span girder. A method of erection of a bridge, comprising: lifting while supporting both ends by a lifting mechanism on a span girder and an adjacent side girder, and joining the side girder to the center span girder and the adjacent side girder. .
ャッキ上で運ばれ、架設位置に配置されることを特徴と
する請求項３に記載の橋梁の架設方法。4. The method according to claim 3, wherein the span girder to be erected is carried on a jack provided on the barge and is arranged at the erection position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31028196A JPH10147912A (en) | 1996-09-20 | 1996-11-21 | Method for removing and erecting bridge |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25052796 | 1996-09-20 | ||
| JP8-250527 | 1996-09-20 | ||
| JP31028196A JPH10147912A (en) | 1996-09-20 | 1996-11-21 | Method for removing and erecting bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10147912A true JPH10147912A (en) | 1998-06-02 |
Family
ID=26539806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31028196A Pending JPH10147912A (en) | 1996-09-20 | 1996-11-21 | Method for removing and erecting bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10147912A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040040695A (en) * | 2002-11-07 | 2004-05-13 | 주식회사 하이테크한상 | Temporary apparatus for dismantalement of slab |
| JP2009052306A (en) * | 2007-08-28 | 2009-03-12 | Kajima Corp | Construction method for replacing bridge girder |
| JP2009287356A (en) * | 2008-06-02 | 2009-12-10 | Kajima Corp | Removing method of structure with leg |
| CN107119578A (en) * | 2017-07-12 | 2017-09-01 | 中铁二局集团有限公司 | The Bridge Erector of the whole two-way erection in hole on a kind of asymmetric framing prefabricated case beam beam of achievable large-tonnage |
| CN110029598A (en) * | 2019-05-20 | 2019-07-19 | 南京林业大学 | Deformation control method across closure segment in a kind of dismounting Continuous Box Girder Bridge |
-
1996
- 1996-11-21 JP JP31028196A patent/JPH10147912A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040040695A (en) * | 2002-11-07 | 2004-05-13 | 주식회사 하이테크한상 | Temporary apparatus for dismantalement of slab |
| JP2009052306A (en) * | 2007-08-28 | 2009-03-12 | Kajima Corp | Construction method for replacing bridge girder |
| JP2009287356A (en) * | 2008-06-02 | 2009-12-10 | Kajima Corp | Removing method of structure with leg |
| CN107119578A (en) * | 2017-07-12 | 2017-09-01 | 中铁二局集团有限公司 | The Bridge Erector of the whole two-way erection in hole on a kind of asymmetric framing prefabricated case beam beam of achievable large-tonnage |
| CN110029598A (en) * | 2019-05-20 | 2019-07-19 | 南京林业大学 | Deformation control method across closure segment in a kind of dismounting Continuous Box Girder Bridge |
| CN110029598B (en) * | 2019-05-20 | 2023-12-26 | 南京林业大学 | Deformation control method for removing midspan closure section of continuous box girder bridge |
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